likelihood vs probability

likelihood and probability both are nouns.

Word	Noun	Adjective	Verb	Adverb
likelihood	Yes	No	No	No
probability	Yes	No	No	No

As nouns, probability is a hypernym of likelihood; that is, probability is a word with a broader meaning than likelihood:

likelihood: the probability of a specified outcome
probability: the quality of being probable; a probable event or the most probable event

likelihood (noun)	probability (noun)
the probability of a specified outcome	the quality of being probable; a probable event or the most probable event
	a measure of how likely it is that some event will occur; a number expressing the ratio of favorable cases to the whole number of cases possible